NATO will defend alliance member Turkey, which struck back after mortar rounds fired from Syria landed inside its border, the alliance's Secretary General Anders Fogh Rasmussen has said.
NATO as an organisation will do what it takes to protect and defend Turkey, our ally. We have more plans in place to make sure that we can protect and defend Turkey and hopefully that way also deter so that attacks on Turkey will not take place.
Speaking at a meeting in Prague, he also welcomed a weekend agreement by Syrian opposition groups to put aside differences and form a new coalition.
Thousands more refugees pour across the border to escape the war in Syria, whilst Turkey says the conflict is threatening their security.
A suggestion that David Cameron has gone "out on a limb" over Syria has been rejected by his official spokesman.